Selfbuilt has done a great review on CPF for the OrcaTorch T20, including the runtime, beamshot, video, user interface, and more.Here's some quote from his review:

"The T20 from Orcatorch fits in very with the established brands in the relatively highly-driven 1x18650, 2xCR123A/RCR class.

Performance-wise – compared to the current-controlled competition - there is a slight drop in efficiency on the T20 (due to the use of high-frequency PWM here). But Orcatorch compensates for this in part my producing a slightly lower step-down level than typical. Output spacing is reasonable – I personally like the low Lo mode used here. With four regular output modes, there is range to suit most people.

All told, the T20 is nice example of an Orcatorch model. It has a decent feature set and overall package. It is definitely another option to consider in the 1x18650, 2xCR123A/RCR class. "